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primary topic: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy.

Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy.
type: AcademicArticle
type: Article
abstract: Bombyx mori silk fibroin fiber is a fibrous protein produced by the silkworm at room temperature and from an aqueous solution whose primary structure is highly repetitive. In this study we analyzed the structural characteristics of native peptides, derived from B. mori silk fibroin, with formic acid treatment using high-resolution solid-state 13C NMR. We establish that the Ser residue bearing a short polar side chain has the ability to stabilize the conformation formed in the model peptides due to its ability to form intermolecular hydrogen bonds involving its hydroxyl group as a donor and the carbonyl groups of other residues as acceptors. On the other hand, insertion of Tyr residue in the basic (AG)n and (AGSGAG)n sequence motifs usually exhibited disruptive effects on the preferred conformations. Moreover, the environmental effect was investigated by mixing the native Cp fraction with the model peptides, showing that there is no significant structural difference on the Ser-containing peptides, while structural transformation was observed on the peptides containing the GAAS unit. This may be attributed to the fact that the Cp fraction promotes the formation of an antiparallel beta-sheet in the Ala-Ala unit. Such periodically disrupted ordered structures in the semicrystalline region of B. mori silk fibroin may be critical not only for facilitating the conformational transformation from silk I to silk II structural form but also for having some correlation with the unique properties of the silk materials.
date: 2004
volume: 5
issue: 5
is part of: Biomacromolecules
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository
has document: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
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has published: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
has document: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Indexer Terms)
has document: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Image (PNG))
subject: QR Microbiology

Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
type: Document

ACS Publications
type: Organization

Biomacromolecules
type: Collection
issn: 15257797

Rena Sugino
type: Person
given name: Rena
family name: Sugino

Raghuvansh Kishore
type: Person
given name: Raghuvansh
family name: Kishore

Tetsuo Asakura
type: Person
given name: Tetsuo
family name: Asakura

Kosuke Ohgo
type: Person
given name: Kosuke
family name: Ohgo

Juming Yao
type: Person
given name: Juming
family name: Yao

Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Indexer Terms)
type: Document
is version of: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
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Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Image (PNG))
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Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Image (PNG))
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Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Image (PNG))
type: Document
is version of: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
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Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (Image (PNG))
type: Document
is version of: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy. (PDF)
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primary topic: Structural analysis of Bombyx mori silk fibroin peptides with formic acid treatment using high-resolution solid-state 13C NMR spectroscopy.

QR Microbiology
type: Concept